Globe-protector for arc lamps



(No Model.)

E G. ASMUS. GLOBE PROTECTOR FOR ARG LAMPS.

No; 413.011. Patented Oct. 15, 1889.

N PETERS. Pr-w-ww n mr, Washingiom 01c.

UNITED STATES PATENT OFFICE.

GUSTAV CARL ASMUS, OF CHICAGO, ILLINOIS.

GLOBE-PROTECTOR FOR ARC LAMPS.

SPECIFICATION forming part of Letters Patent No. 413,011, dated October 15, 1889.

Application filed February 28, 1889. Serial No. 300,967. (No model.)

To all whom it may concern.-

Be it known that I, GUSTAV CARL AsMUs, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have inven ted a Globe-Protector for Electric-Arc Lamps; and I do hereby declare that the following is a full, clear, and exact description of the invention.

One of the greatest expenses to maintain street are lights is caused by the breaking of the glass globes. The intense heat produced by the are inside the globes and the dropping down of slag formed from the copper-coated carbons in a highly-liquid state on the lower part of the globes break the bottoms of the globes very easily and make them useless in a very short time. ire-netting has been placed around the globes to keep them from falling to pieces; but this does not protect them against cracking. As soon as a globe is broken on an arc lamp the current of air which will follow immediately will destroy the brilliancy of the light and cause the carbons to burn more quickly and uneven.

The globes have generally a round openin g at the bottom of about four inches diameter, with a rim projecting downward, by which they are held in position on an iron plate attached to the frame which carries the lamp. The top opening of the globe is generally larger, and through it can be placed a round plate of some transparent and indestructible materialas mica or its equivalent-and the plate having a circular opening in its center of about three and one-half inches diameter for the passage of one or two carbons through ing it, the outside and inside edges are bound 1 or strengthened by a thin plate of copper or other suitable material, and a light handle is attached to it, by which the plate can be lifted up from its place inside the globe, and by which it can be hung up or secured on a suitably-located hook or pin on the framing while the globe is being cleaned by the trimmer.

In the accompanying drawings, Figure 1 shows the globe-protector in two views. P is the plate of transparent material; 0" r, the rim of metal to strengthen and stiffen the edges. h is the handle attached-to the plate for easier handling the protector. Fig. 2 shows the protector P in position on a lamp with two carbons. Fig. 3 shows the plate in a lamp with single carbon.

Gris the glass globe; F, the frame; C, the carbons; P, the protecting-plate.

The plate P need not in any way be fastened. It will rest y its own Weight in the required position.

What I claim as my invention, and desire to secure by Letters Patent, is

The globe-protecting plate P,with the metal binding-strips r r on the inside and outside rim 0" r, and handle 72,, for the purpose of strengthening the thin plate and facilitating the handling of the same during the cleaning process of the lamps, substantially as specified.

GUSTAV CARL ASMUS.

Witnesses:

P. W. GERECKE, J onn LUNDITS. 

